Nansen bottle

{
  "id": "MLC-T-MET-007469",
  "term": "Nansen bottle",
  "field": "Meteorology and atmospheric science",
  "definition": "A device used in oceanography to collect water samples from specific depths and to measure water temperature at those depths. It consists of a metal cylinder with valves at both ends that are triggered to close when a messenger weight slides down the hydrographic wire. This instrument was widely used before the advent of electronic sensors like CTDs (Conductivity, Temperature, Depth profilers).",
  "url": "https://mlchart.com/terminology/meteorology/nansen-bottle/"
}